[O] src blocks in texinfo export

[Dario Hamidi]

Hello, 

I discovered a problem when exporting source blocks containing braces to
texinfo using `ox-texinfo'.  The texinfo exporter wraps source blocks
into a `example' environment, which takes care of source block
indentation but doesn't allow any braces to occur in the contained text,
since braces have a special meaning in TeX.

After reading the `texinfo' manual, it became clear that literal examples
should be exported also in a `verbatim' environment.  A patch making
this change to the exporter is attached.

Dario

ox-texinfo.el.patch
Description: Text Data